diff --git a/scripts/asn1_compiler.c b/scripts/asn1_compiler.c
index 7b6756a8c15d..4c3f645065a4 100644
--- a/scripts/asn1_compiler.c
+++ b/scripts/asn1_compiler.c
@@ -625,7 +625,7 @@ int main(int argc, char **argv)
 	p = strrchr(argv[1], '/');
 	p = p ? p + 1 : argv[1];
 	grammar_name = strdup(p);
-	if (!p) {
+	if (!grammar_name) {
 		perror(NULL);
 		exit(1);
 	}